MAX6841DUKD0+T Maxim Integrated Products, MAX6841DUKD0+T Datasheet

IC MPU/RESET CIRC SOT23-5

MAX6841DUKD0+T

Manufacturer Part Number
MAX6841DUKD0+T
Description
IC MPU/RESET CIRC SOT23-5
Manufacturer
Maxim Integrated Products
Type
Simple Reset/Power-On Resetr
Datasheet

Specifications of MAX6841DUKD0+T

Number Of Voltages Monitored
1
Output
Push-Pull, Push-Pull
Reset
Active High/Active Low
Reset Timeout
150 µs Typical
Voltage - Threshold
0.788V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
SOT-23-5, SC-74A, SOT-25
Monitored Voltage
0.9 V to 1.5 V
Output Type
Active High, Active Low, Push-Pull
Manual Reset
Resettable
Watchdog
No Watchdog
Battery Backup Switching
No Backup
Power-up Reset Delay (typ)
0.15 ms
Supply Voltage (max)
1.8 V
Supply Voltage (min)
0.75 V
Supply Current (typ)
8.1 uA
Maximum Power Dissipation
571 mW
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
Power Fail Detection
No
Undervoltage Threshold
0.765 V
Overvoltage Threshold
0.81 V
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
MAX6841DUKD0+TTR
The MAX6841–MAX6845 microprocessor (µP) supervi-
sory circuits monitor ultra-low-voltage power supplies in
µP and digital systems. They provide excellent circuit
reliability at low cost by eliminating external compo-
nents and adjustments when used with +0.9V to +1.5V
systems. Factory-trimmed reset thresholds are avail-
able for the MAX6841/MAX6842. The MAX6843/
MAX6844/MAX6845 provide a RESET IN input, allowing
the user to externally adjust the reset threshold. The
MAX6841–MAX6845 family features a debounced man-
ual reset input (MR). The reset comparator is designed
to ignore fast transients on V
The MAX6841–MAX6845 assert a reset signal whenev-
er the V
adjustable threshold or whenever manual reset (MR) is
asserted. Reset remains asserted for a fixed timeout
delay after V
when manual reset is deasserted. Five timeout periods
are available for each part: 150µs (voltage detector ver-
sion), 1.5ms, 30ms, 210ms, and 1.68s (typ).
The MAX6841/MAX6843 have an active-low push-pull
reset output. The MAX6841/MAX6842/MAX6844 have
an active-high push-pull reset output, and the
MAX6842/MAX6845 have an active-low open-drain
reset output. The active-low open-drain reset output
requires a pullup resistor that can be connected to a
voltage from 0 to V
The low supply current (5.7µA) and small package
(SOT23-5) make the MAX6841–MAX6845 ideal for use
in portable equipment.
19-2625; Rev 2; 12/05
Selector Guide and Typical Operating Circuit appear at end
of data sheet.
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
Computers
Controllers
Intelligent Instruments
Critical µP and µC Power Monitoring
Portable/Battery-Powered Equipment
Telecom/Networking Equipment
Basestations
Servers/Workstations
CC
supply voltage declines below a preset or
CC
has risen above the reset threshold and
________________________________________________________________ Maxim Integrated Products
Ultra-Low-Voltage µP Reset Circuits and
CC
.
General Description
CC
.
Applications
♦ Factory-Set Reset Threshold Voltages for
♦ Adjustable Threshold RESET IN
♦ Low Power Consumption: 5.7µA (typ)
♦ ±2.5% Reset Threshold Accuracy
♦ Five Timeout Periods: 150µs (Voltage Detector
♦ Available in Three Output Configurations
♦ Guaranteed Reset Valid to V
♦ Manual Reset Input
♦ Immune to Short V
♦ Space-Saving 5-Pin SOT23 Package
Note: Insert desired suffix letter (from the Threshold Suffix Guide
and the Active Timeout Period tables) into the blanks to com-
plete the part number. For example, the MAX6842GUKD1 has a
reset threshold of 1.11V and a typical reset timeout period of
1.5ms. Sample stock is generally available on standard versions
only (see the Standard Versions table). Standard versions
require a minimum order increment of 2.5k units. Nonstandard
versions must be ordered in 10k-unit increments. Contact factory
for availability. All parts are offered in tape-and-reel only.
Devices are available in both leaded and lead-free packaging.
Specify lead-free by replacing “-T” with “+T” when ordering.
MAX6841_UKD_-T
MAX6842_UKD_-T
MAX6843UKD_-T
MAX6844UKD_-T
MAX6845UKD_-T
Monitoring Supplies from 0.9V to 1.5V
(MAX6841/MAX6842)
(MAX6843/MAX6844/MAX6845)
Over Temperature
Version), 1.5ms, 30ms, 210ms, and 1.68s
(Active Low)
Push-Pull RESET
Push-Pull RESET
Open-Drain RESET
TOP VIEW
RESET
RESET
PART
GND
1
2
3
Voltage Detectors
SOT23-5
MAX6841
MAX6842
Ordering Information
5 V
4
CC
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
MR
CC
Transients
Pin Configurations
RESET IN
(RESET)
RESET
GND
CC
1
2
3
= 0.55V
( ) ARE FOR 6844
SOT23-5
MAX6843
MAX6844
MAX6845
PIN-PACKAGE
5 SOT23-5
5 SOT23-5
5 SOT23-5
5 SOT23-5
5 SOT23-5
Features
5 V
4
MR
CC
1

Related parts for MAX6841DUKD0+T

MAX6841DUKD0+T Summary of contents

Page 1

... Basestations Servers/Workstations Selector Guide and Typical Operating Circuit appear at end of data sheet. ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. ♦ Factory-Set Reset Threshold Voltages for Monitoring Supplies from 0.9V to 1.5V (MAX6841/MAX6842) ♦ ...

Page 2

Ultra-Low-Voltage µP Reset Circuits and Voltage Detectors ABSOLUTE MAXIMUM RATINGS Terminal Voltage (with respect to GND) V .......................................................................-0.3V to +6V CC MR, RESET IN, RESET (open-drain).........................-0.3V to +6V Push-Pull RESET and RESET .....................-0. Input Current (all pins) ........................................................20mA ...

Page 3

Ultra-Low-Voltage µP Reset Circuits and ELECTRICAL CHARACTERISTICS (continued +0.55V to +1.8V -40°C to +85°C, unless otherwise noted. Typical values are PARAMETER SYMBOL Open-Drain RESET Output Voltage Open-Drain RESET Output Leakage Current Push-Pull ...

Page 4

Ultra-Low-Voltage µP Reset Circuits and Voltage Detectors (V = 1.5V +25°C, unless otherwise noted NORMALIZED V RESET THRESHOLD CC vs. TEMPERATURE 1.015 V = 0.833V TH 1.010 1.005 1.000 0.995 0.990 0.985 -40 - ...

Page 5

Ultra-Low-Voltage µP Reset Circuits and PULLUP MANUAL RESET V REF DETECT RESET TIMEOUT PERIOD GND Detailed Description A microprocessor’s (µP’s) reset input starts the µ known state. The MAX6841–MAX6845 assert a reset dur- ing ...

Page 6

Ultra-Low-Voltage µP Reset Circuits and Voltage Detectors RESET IN decreases. The MAX6843/MAX6844/ MAX6845 assert a reset when the voltage at RESET IN falls below the RESET IN threshold (V leakage current at RESET IN allows for relatively large- value resistors ...

Page 7

Ultra-Low-Voltage µP Reset Circuits and 0. PULLUP MAX6842 MAX6845 RESET GND Figure 5. Using the MAX6842/MAX6845 Open-Drain RESET Output with Multiple Supplies Using the MAX6842/MAX6845 Open-Drain RESET Output with Multiple Supplies Generally, the pullup connected to the ...

Page 8

Ultra-Low-Voltage µP Reset Circuits and Voltage Detectors PART MANUAL RESET ✔ MAX6841 ✔ MAX6842 ✔ MAX6843 ✔ MAX6844 ✔ MAX6845 Typical Operating Circuit V IN 3.3V 0.9V DC/DC CONVERTER V CC MAX6842D/E RESET PUSHBUTTON MR RESET SWITCH GND 8 _______________________________________________________________________________________ ...

Page 9

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 _____________________ 9 © 2005 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products, Inc ...

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